1FEATURES

• Complete Integration Solution for LNB and I2C

• DiSEqC 1.x Compatible

• Supports 5-V and 12-V Power Bus

• Up to 1000-mA Accurate Output Current Limit

Adjustable by External Resistor and I2C

• Boost Converter With Low Rdson Internal

Power Switch

• Dedicated Enable Pin for Non-I2C Application

• Low Noise, Low Drop Output With Push-Pull

Output Stage

• Built-In Accurate 22-kHz Tone Generator or

External Pin

• Adjustable Soft-Start and 13-V/18-V Voltage

Transition Time

• Compliant with main satellite receiver systems

Specifications

• LNB Short Circuit Dynamic Pprotection

• Diagnostics for Output Voltage Level, Input

Supply UVLO, and DiSEqC Tone Output

• Cable Disconnect Diagnostic

• Available in a 16-Pin QFN 3-mm x 3-mm (RTE)

Package

APPLICATIONS

• Set Top Box Satellite Receiver

• TV Satellite Receiver

• PC Card Satellite Receiver

DESCRIPTION/ORDERING INFORMATION

Designed for analog and digital satellite receivers, the TPS65233 is a monolithic voltage regulator with I2C

interface, specifically to provide the 13-V/18-V power supply and the 22-kHz tone signaling to the LNB downconverter

in the antenna dish or to the multi-switch box. It offers a complete solution with very low component

count, low power dissipation together with simple design and I2C standard interfacing.

TPS65233 features high power efficiency. The boost converter integrates a 120-mΩ power MOSFET running at

500-kHz switching frequency. Drop out voltage at the linear regulator is 0.8 V to minimize power loss. TPS65233

provides multiple ways to generate the 22-kHz signal. Integrated linear regulator with push-pull output stage

generates clean 22-kHz tone signal superimposed at the output even at zero loading. Current limit of linear

regulator can be programmed by external resistor with ±10% accuracy. Full range of diagnostic read by I2C is

available for system monitoring.

The part is available in a 16-pin QFN 3-mm x 3-mm (RTE) package.